CN107217129A - High silicon steel plate and its production method with excellent machining property and magnetic property - Google Patents
High silicon steel plate and its production method with excellent machining property and magnetic property Download PDFInfo
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- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular fabrication or treatment of ingot or slab
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
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Abstract
It is an object of the invention to provide a kind of high silicon steel plate and a kind of method of the manufacture steel plate with excellent machining property and magnetic property.
Description
The application be submit on December 20th, 2012 it is entitled " have excellent machining property and magnetic property high silicon steel plate and
The divisional application of 201280062641.9 applications for a patent for invention of its production method ".
Technical field
Present disclosure is related to a kind of high silicon steel plate with excellent machining property and magnetic property, and be related to a kind of manufacture should
The method of steel plate.
Background technology
Steel plate containing silicon has good magnetic property, and is therefore widely used as electric steel plate.For example, silicon steel plate is used as becoming
Depressor core material, motor, generator and other electronic devices, in this case, it is desirable to which silicon steel plate has good magnetic
Energy.Especially, due to current environment and energy problem, it is desirable to which silicon steel plate is effective in terms of energy loss is reduced.To ring
The concern of border and energy problem is related to magnetic flux density and core loss.In other words, as magnetic flux density increases, the size of magnetic core
Reduce, so that electronic device is smaller, and as core loss is reduced, energy loss can also be reduced.
Causing the core loss of energy loss includes eddy-current loss and magnetic hystersis loss.As alternating current (AC) power frequency increases
Plus, the increase of eddy-current loss amount.When to magnetic core apply magnetic field when, eddy-current loss is produced in the form of generating heat, to magnetic core addition silicon with
Reduce the eddy current loss of magnetic core.Silicone content in such as steel increases to 6.5%, then will not occur the magnetostriction for producing noise
(0%), and steel magnetic conductivity maximize.In addition, in the case that the silicone content in steel is 6.5%, the magnetic property of steel can be notable
Improve.Therefore, the high silicon steel with good magnetic property can be used in high value electronic device, and the high value electronic device is as used
In the phase inverter and reactor in novel renewable energy power station, the inductive heater for Air Turbine Generator and it is used for
The reactor of continuing power supply.
High silicon steel plate containing 6.5% silicone content has excellent magnetic property.However, with the increase of steel plate silicone content,
The fragility increase of steel plate, toughness is significantly reduced.It is thus known that can not possibly be had in practice using conventional cold rolling process processing
The silicon steel plate of more than 3.5% silicone content.In other words, due to the intrinsic limitation of cold rolling technology, it is known that with good magnetic property
High silicon steel plate is processed not by cold rolling method.Therefore, in order to overcome the limitation of cold-rolling practice, it is directed to for a long time to new
The research of technology.
Due to the height for being difficult to there is good magnetic property by conventional hot rolling treatment and conventional cold rolling (or warm-rolling) processing
Silicon steel plate, thus attempt to process high silicon steel plate by other method.
The method as high silicon steel plate process technology being currently known is casting, by using single roller or double in this method
The casting processing of roller directly high silicon steel plate of the manufacture with final thickness.Patent Document 1 discloses this method a example.
However, in this approach, the shape of control cast steel slab is extremely difficult.In particular, such as the steel of fusing is directly cast
Into the sheet material with final product thickness, then the surface of the sheet material can be very coarse and easy to crack, therefore is directly cast using this
The method made is difficult to obtain the sheet material with magnetic property is improved.Further, since casting sheet material is in uneven thickness, it is this directly to cast
Make method and be not suitable for commercial production.Patent document 2 discloses that a kind of so-called compound (clad) method, in the method,
High silicon steel covered with low-silicon steel is rolled.However, the disclosure method is not commercialized also.
In addition, patent document 3 discloses that a kind of PM technique for being used to manufacture high silicon steel block, the high silicon steel block is used
In the high silicon steel plate of replacement.Although straight iron powder core, high silicon-steel powder core and sendust core has been used in combination, due to manufacture
The characteristic of the powder of core, these cores have the soft magnet performance less than high silicon steel plate magnetic property.
According to the batch techniques currently used for high silicon steel plate of the manufacture with 6.5% silicone content, a kind of chemical vapors deposition
(CVD) method is used to make SiCl in (diffusion) annealing process4It is diffused into the steel plate with 3% silicone content.Known example
Such as Patent Document 4 discloses the example of many technologies.However, according to the technology, having used virose SiCl4, and need
Take a long time implementation diffusion annealing processing.
In addition, having attempted to manufacture thin high silicon steel plate by a kind of so-called warm rolling method in the lab, this method is improved
Rolling process temperature.If by conventional continuously casting process processing billets, heated before hot rolling of steel billet in reheating furnace several
Individual hour is heated to more than 1100 DEG C, then, now, steel billet may be opened due to the temperature difference of its surface temperature and central temperature
Split.In addition, when steel billet takes out simultaneously hot rolling from reheating furnace, steel billet may be broken.For example, Fig. 1 shows 6.5%-Si steel, it is described
6.5%-Si steel melts in 50-kg vacuum inductance smelting furnaces, the steel billet by kneading (milling) formation 200-mm, in argon
(Ar) heating reaches 1100 DEG C, and hot rolling immediately for one and a half hours under atmosphere.Steel billet is broken in the hot rolling.This rise is rolled
The technology of temperature processed can improve the rolling characteristic of steel, but produce many other problems in the hot rolling.
(patent document 1) Japanese patent application discloses No. S56-003625
(patent document 2) Japanese patent application discloses No. H5-171281
(patent document 3) Korean Patent No. 0374292
(patent document 4) Japanese patent application discloses No. S62-227078
The content of the invention
Technical problem
Several aspects of present disclosure provide a kind of high silicon steel plate with excellent machining property and magnetic property, and provide
A kind of method for manufacturing the steel plate.
Technical scheme
According to the one side of present disclosure, a kind of high silicon steel plate with excellent machining property and magnetic property is included with weight
Measure the C of % meters：Less than 0.05% (not including 0%), N：Less than 0.05% (not including 0%), Si：4% to 7%, Al：0.5%
To 3%, Si+Al：4.5% to 8%, and surplus is Fe and inevitable impurity.
According to the another aspect of present disclosure, a kind of manufacture has the side of the high silicon steel plate of excellent machining property and magnetic property
Method includes：Molten metal is cast as the band with below 5mm thickness, the molten metal is included in terms of weight %
C：Less than 0.05% (not including 0%), N：Less than 0.05% (not including 0%), Si：4% to 7%, Al：0.5% to 3%, Si+
Al：4.5% to 8%, and surplus is Fe and inevitable impurity；Cast strip described in hot rolling at a temperature of more than 800 DEG C；
By the strand-anneal(ing) after the hot rolling within the temperature range of 900 DEG C to 1200 DEG C；Cool down the band of the annealing；At 300 DEG C
The band cooled down within the temperature range of to 700 DEG C described in warm-rolling；Finally by the band after the warm-rolling at 800 DEG C to 1200 DEG C
Annealed in temperature range.
The above-mentioned aspect of the disclosure does not include all aspects and feature disclosed by the invention.From embodiments below elaboration
Other aspects or feature, advantage and effect of the disclosure will be clearly understood.
Beneficial effect
According to the disclosure, can be combined by the steel to the silicone content with more than 5 weight % implement Strip casting, hot rolling,
Hot-rolled band annealing, cooling, warm-rolling and annealing process, it is possible to provide a kind of high silicon steel plate with good magnetic property.In addition, passing through
Control silicon (Si) and aluminium (Al) mutual relative amount, it is possible to provide a kind of that there is the high silicon steel plate for improving rolling characteristic.
Brief description of the drawings
Fig. 1 is the photo that hot rolled steel plate is broken in the hot rolling.
Fig. 2A and Fig. 2 B are Si-Fe phasors and show B2 ordered structures and DO3The schematic diagram of atomic arrangement in ordered structure.
Fig. 3 is the figure for showing the elongation of high silicon steel plate relation corresponding with temperature.
Fig. 4 is to show occur the photo of Si- segregations during Strip casting.
Embodiment
Inventor is to preventing steel plate is broken and improved the brittle technology of cold-rolling of steel plate processing in the hot rolling from carrying out
Research.Result of study shows that inventor has found the composition by reasonable adjusting steel, directly processes thin via Strip casting process
Steel plate, and then warm-rolling sheet metal, can largely produce and avoid being broken and obtaining in terms of cold-rolling treatment fragility in course of hot rolling
Improved high silicon steel plate.
An embodiment according to the disclosure is hereinafter elaborated a kind of high silicon steel plate by this.
One embodiment of the disclosure provides a kind of high silicon steel plate with excellent machining property and magnetic property.The high silicon
Steel plate includes the C in terms of weight %：Less than 0.05% (not including 0%), N：Less than 0.05% (not including 0%), Si：4% to
7%, Al：0.5% to 3%, Si+Al：4.5% to 8%, and surplus is Fe and inevitable impurity.
Carbon (C)：Below 0.05 weight % is not (including 0%)
Due to the carbon (C) in steel to refine precipitation and hinder the dislocation in the operation of rolling to move, the carbon (C) in such as steel plate contains
Amount is high, then the rolling performance of steel plate can be deteriorated.In addition, such as carbon (C) is removed not from final finished, then the carbon (C) remained can hinder
Hinder the movement of magnetic domain in AC magnetic fields, and the magnetic property of final products is deteriorated.As carbon (C) content in steel plate is more than
0.05%, then the fragility of steel plate can rise, and the rolling performance of steel plate is deteriorated.
Nitrogen (N)：Below 0.05 weight % is not (including 0%)
Nitrogen (N) is a kind of interstitial element, and hinders the dislocation in the operation of rolling to move as carbon (C).Therefore, such as steel
Substantial amounts of nitrogen is added in plate, then the rolling performance of steel can be reduced.In addition, as contained substantial amounts of nitrogen (N) in final finished, then can hinder
Hinder movement of the magnetic domain in AC magnetic fields, and the magnetic property of final products is deteriorated.Therefore, the upper limit of nitrogen (N) content is preferred
For 0.05 weight %.
Silicon (Si)：4 weight % to 7 weight %
Silicon (Si) improves the ratio resistance of steel plate and therefore reduces core loss.As silicon (Si) content be less than 4 weight %, then without
Method obtains the magnetic property of expected steel plate in disclosure case study on implementation.On the other hand, such as silicon (Si) content is more than 7 weight %, then
It is difficult to be machined the steel plate.Thus, silicon (Si) content is preferably in the range of 4 weight % to weight 7%.
Aluminium (Al)：0.5 weight % to 3 weight %
Aluminium (Al) is the maximally effective element for being only second to silicon (Si) in terms of the ratio resistance of steel plate is improved.Such as replaced with aluminium (Al)
For silicon (Si), then compared with using the situation of silicon (Si), the effect for improving ratio resistance can be relatively low.However, the rolling of steel plate
Performance can be improved.Such as aluminium (Al) content is less than 0.5 weight %, then can not obtain the effect for improving rolling performance, and such as aluminium (Al) contains
Amount is more than 3 weight %, then can not obtain the effect for improving magnetic property.Thus, aluminium (Al) content is preferably in 0.5 weight % to 3 weights
Measure in the range of %.
According to the disclosure embodiment, the content of the Si+Al by adjusting hot rolling treatment and cold-rolling treatment can
Control silicon (Si) content and aluminium (Al) content.In other words, for example, by controlling silicon (Si) and aluminium (Al) mutual relative amount,
The ratio resistance of steel plate can be improved to reduce core loss.Si+Al contents in such as steel plate are less than 4.5%, then can influence steel plate
High-frequency characteristic, such as Si+Al contents be more than 8%, then be difficult to be machined the steel plate.Thus, Si+Al contents preferably exist
In the range of 4.5% to 8%.
In the embodiment of the disclosure, the other components of steel plate are iron (Fe).However, from raw material or production environment
Impurity can inevitably be included in steel plate in, therefore, it is impossible to remove this impurity from steel plate completely.Steel processing manufacturing industry
These impurity well-known to the ordinarily skilled artisan, therefore, the disclosure is no longer illustrated above-mentioned impurity.
Hereinafter, an embodiment according to the disclosure is elaborated into a kind of method for manufacturing high silicon steel plate.
According to the embodiment of the disclosure, manufacturing the method for high silicon steel plate includes：Molten metal is cast as with 5mm
The band of following thickness, the molten metal includes the C in terms of weight %：Less than 0.05% (not including 0%), N：0.05%
Below (not including 0%), Si：4% to 7%, Al：0.5% to 3%, Si+Al：4.5% to 8%, and surplus is Fe and can not keep away
The impurity exempted from；Cast strip described in hot rolling at a temperature of more than 800 DEG C；By institute within the temperature range of 900 DEG C to 1200 DEG C
State the strand-anneal(ing) after hot rolling；Cool down the annealing band；Cooled down described in warm-rolling within the temperature range of 300 DEG C to 700 DEG C
Band；Finally the band of the warm-rolling is annealed within the temperature range of 800 DEG C to 1200 DEG C.
Strip casting
It is difficult to manufacture high silicon steel plate using conventional hot-rolling method.However, inventor will be it has been found that by that will have above-mentioned group
Into molten metal be cast as band (Strip casting), can simply manufacture hot-rolled band (steel plate).Therefore, the present invention is disclosed
Embodiment apply a kind of strip casting process.
High silicon steel plate is such as manufactured using conventional hot-rolling method, then due to inside steel billet and outside temperature difference, bloom slab meeting
Cracking.In addition, such as the billet surface with high silicon content is heated to more than 1200 DEG C of temperature, then it is likely to form with compared with eutectic
Fayalite (the Fe of point2SiO4), so as to cause billet surface (including side) corrosion, and therefore cause cracking, and because height is crisp
Property, steel billet may be broken in hot rolling.
However, the scheme such as proposed according to inventor, band is cast as by the molten metal with above-mentioned composition, can be straight
High silicon steel plate of the manufacture with 1mm to 2mm thickness is connect, and the high silicon steel plate will not ftracture, this is with using conventional hot-rolling method
The high silicon steel plate of manufacture is different.In addition, as strip caster is connected to hot rolling kneading machine, then hot rolling can be carried out continuously with further
Reduce the thickness of high silicon steel plate.In addition, as shown in figure 4, silicon (Si) can be in the high silicon steel plate manufactured by Strip casting process
Segregation occurs for central area.The segregation of silicon (Si) can improve the rolling performance of high silicon steel plate.
In the embodiment of present disclosure, the initial cast thickness of band can be determined according to the thickness of final products.
For example, initial cast thickness is preferably set to below 5.0mm.Initial cast thickness is more preferably set as 1.0mm to 5.0mm.Such as
Initial cast thickness is more than 5.0mm, then the load of subsequent warm-rolling process will increase, thus processability is deteriorated.On the other hand,
As initial cast thickness is less than 1.0mm, then strip caster is excessively extended, and improves by warm-rolling the surface quality of band
It can be restricted.
In addition, implementing band casting process under at least one of blanket of nitrogen and argon atmospher atmosphere.
Hot rolling
Above-mentioned cast strip can be processed by course of hot rolling.The course of hot rolling can reduce the load of subsequent warm-rolling process
And the cast microstructure of band is destroyed, so as to form tiny crystal grain in band.The treatment temperature of course of hot rolling is preferred
It is set as more than 800 DEG C.Such as treatment temperature is less than 800 DEG C, then as shown in Figure 2 A, and the B2 shown in Fig. 2 B is easily formed in band
Ordered structure, and the toughness of band is reduced and is caused brittle fracture.Factor in view of improving toughness and economic aspect,
The upper limit of course of hot rolling treatment temperature is preferably 900 DEG C.
Hot-rolled band is annealed
Hot-rolled band is annealed.Hot-rolled band is annealed, to eliminate the hot rolling stress in band.Annealing temperature is preferably set
In the range of 900 DEG C to 1200 DEG C.Such as annealing temperature is less than 900 DEG C, then the recrystallization of band can not be completed, therefore can not be obtained
Expected toughness.On the other hand, such as annealing temperature is higher than 1200 DEG C, then can obtain coarse grain by recrystallization, and therefore reduce
The intensity of band.Thus, annealing temperature is preferably in the range of 900 DEG C to 1200 DEG C.
Hot-rolled band can be made annealing treatment under non-oxidizing atmosphere.The non-oxidizing atmosphere is blanket of nitrogen, argon
At least one of atmosphere, hydrogen and nitrogen mixture atmosphere atmosphere.
Completed in addition, annealing process can continue until recrystallization.Annealing process can preferably be carried out 10 seconds to 5 minutes.
Cooling
By the cooling of above-mentioned annealing band.It is preferred that the annealing band is cooled in the cool time section of 5 seconds to 1 minute
100 DEG C within the temperature range of room temperature.Specifically, above-mentioned annealing band is cooled down.Cooling velocity preferably at 13 DEG C/sec extremely
In the range of 160 DEG C/sec.Such as cool down speed and be less than 13 DEG C/sec, then the fringe region of band is likely to form crackle, and due to having
The generation of sequence phase, the rolling performance that can not make band by cooling procedure is improved.On the other hand, such as cooling velocity higher than 160 DEG C/
Second, then expected rolling performance and economic benefit in disclosure embodiment can not be obtained simultaneously.
Warm-rolling
By the band of the cooling within the temperature range of 300 DEG C to 700 DEG C warm-rolling.Reference picture 3, due to being reasonably determined
Si+Al content in band, thus the cooling band has a critical point at 300 DEG C.Specifically, less than 300
At a temperature of DEG C, the toughness of band is very low.Treatment temperature such as warm-rolling process is higher than 700 DEG C, then in subsequent processing such as acid
Wash in processing and problem occurs.Thus, the treatment temperature of warm-rolling process is preferably within the temperature range of 300 DEG C to 700 DEG C.
In addition, after warm-rolling processing, band has below 0.5mm final thickness.
Final annealing
By warm-rolling band (steel plate) annealing.Annealing temperature is preferably set in the range of 800 DEG C to 1200 DEG C.Such as anneal temperature
Degree is less than 800 DEG C, then the insufficient growth of crystal grain, and can not obtain expected core loss grade.On the other hand, such as annealing temperature
Higher than 1200 DEG C, then economic benefit and processability can be reduced, even if also, using non-oxidizing atmosphere, it can also promote surface shape
Into oxide layer.The surface oxide layer can hinder the motion of magnetic domain, and therefore hinder the magnetic property of band.Thus, annealing temperature
It is preferred that in the range of 800 DEG C to 1200 DEG C.
In addition, annealing process continues to that recrystallization is completed.Annealing process is preferred to be carried out 10 seconds to 5 minutes.
[embodiment]
High si fe alloy is cast as the sheet material with 2.0mm thickness by using vertical double rolling sheets casting machines, it is described
High si fe alloy each include 0.005% carbon content in terms of weight %, 0.0033% nitrogen content and such as the institute of table 1
The silicon and aluminium content shown.Then, there is 2.0mm thickness by using the hot-rolling mill kneading machine hot rolling for being connected to sheet material casting machine
Sheet material is cast, to form the high silicon steel plate with 1.0mm thickness.The initial temperature of course of hot rolling is 1050 DEG C.The hot rolling is high
Silicon steel plate heats 5min and subsequent with 200 DEG C/sec under the atmosphere comprising 20% hydrogen and 80% nitrogen at a temperature of 1000 DEG C
Cooling velocity is quenched to room temperature.Then, with high silicon steel plate described in hydrochloric acid solution pickling to remove surface oxide layer.Thermally treated
The thickness of high silicon steel plate is reduced to 0.1mm at a temperature of 400 DEG C.Then, high silicon steel plate comprising 20% hydrogen and 80% nitrogen and
Dew point is under -10 DEG C or lower of drying atmosphere, in being made annealing treatment 10 minutes at 1000 DEG C, so as to obtain final magnetic property.
Then, the rolling performance and magnetic property of high silicon steel plate are measured.
In table 1, B50 refers to flux density value, and the high silicon steel plate with high magnetic flux density value is evaluated as with good magnetic
Performance.In addition, W10/400 and W10/1000 refer to the core loss value measured under commercial frequency, with low core loss value
Silicon steel plate is evaluated as with good magnetic property.[table 1]
*CS:Control sample, * * IS:Sample of the present invention
As shown in table 1, due to the Si and Al content in the embodiment of disclosure control sample 1 to 3 of the present invention,
Thus the sample has excellent rolling performance.In addition, the flux density value B50 of sample 1 to 3 of the present invention is higher than control sample
1 to 3 flux density value, and core loss rate the value W10/400 and W10/1000 of sample 1 to 3 of the present invention are less than control sample 1
To 3 core loss rate value.The magnetic property of sample 1 to 3 i.e. of the present invention is good.
Due to being not added with aluminium (Al), control sample 1 has poor rolling performance, and the magnetic property of control sample 1 is not good.
Because aluminium (Al) content is low, the rolling performance that control sample 2 has is general.In addition, control sample 2 has less than this
The flux density value B50 of invention sample 1 to 3 and core loss rate the value W10/400 and W10/1000 higher than invention sample 1 to 3.
That is the magnetic property of control sample 2 is not good.
Due to 3% high aluminium content, control sample 3 has excellent rolling performance.It is higher than however, control sample 3 has
Core loss rate the value W10/400 and W10/1000 of sample 1 to 3 of the present invention.That is the magnetic property of control sample 3 is bad.
These results show to control the effect of the content of silicon (Si) and aluminium (Al).
(embodiment 2)
Si fe alloy is cast as the band with 2.0mm thickness, the bag by using vertical double roller strip caster
Include 6.3% Si, 0.3% Al, 0.002% C and 0.003% N of the si fe alloy in terms of weight %.Then, by adopting
There should be the cast strip of 2.0mm thickness with the hot-rolling mill hot rolling for being connected to strip caster, to be formed with 1.0mm thickness
High silicon steel plate.The initial temperature of course of hot rolling is 1000 DEG C.By by the high silicon steel plate of the hot rolling including 20% hydrogen and 80% nitrogen
Atmosphere under implement annealing in heating 5min and then the high silicon steel plate at 1000 times temperature and cooled down with different cooling velocities
Processing.Specifically, the high silicon steel plate is cooled to 100 with the cooling velocity of 100 DEG C/sec and 10 DEG C/sec from 800 DEG C respectively
℃.The high silicon steel plate (sample) of heat treatment described in hydrochloric acid solution pickling is used to remove surface oxide layer, it is then warm at 400 DEG C
Roll.Then, crack detection is carried out to sample.With 100 DEG C/sec in the range of the cooling velocity advised in the embodiment of the disclosure
The sample thickness that is cooled down of cooling velocity can be reduced to 0.1mm, and do not observe crackle.However, with the implementation of the disclosure
Advise the sample that 10 DEG C/sec of cooling velocity outside cooling velocity scope is cooled down in scheme, when its shrinkage factor is more than 50%
When start edge region cracking.In other words, such as cooling velocity is low, although steel plate is heat-treated after rolling, still can not
The ordered phase in steel plate is removed, and therefore can not improve the rolling performance of steel plate.
Claims (6)
1. a kind of method for manufacturing the high silicon steel plate with excellent machining property and magnetic property, methods described is included：
Molten metal is cast as by the band with below 5mm thickness by using vertical double roller strip caster, it is described molten
The metal of change includes the C counted based on weight %：Less than 0.05% (not including 0%), N：Less than 0.05% (not including 0%), Si：
4% to 7%, Al：0.5% to 3%, Si+Al：4.5% to 8%, and surplus is Fe and inevitable impurity；
The cast strip described in hot rolling at a temperature of 800 DEG C to 900 DEG C；
By the strand-anneal(ing) after the hot rolling at a temperature in the range of 900 DEG C to 1200 DEG C；
Cool down the annealing band；
Band is quenched described in warm-rolling at a temperature in the range of 300 DEG C to 700 DEG C；And
Finally the band after the warm-rolling is annealed at a temperature in the range of 800 DEG C to 1200 DEG C,
Wherein, the annealing band carries out cooling until the band is cooled to 95 DEG C with 13 DEG C/sec to 160 DEG C/sec of speed
To within the temperature range of 105 DEG C.
2. the method for claim 1 wherein at least once casting in blanket of nitrogen and argon atmospher to the molten metal.
3. the method for claim 1 wherein the band of the hot rolling is annealed under non-oxidizing atmosphere.
4. the method for claim 3, wherein the non-oxidizing atmosphere is blanket of nitrogen, argon atmospher, hydrogen and nitrogen mixture atmosphere
At least one.
5. the method for claim 1 wherein the warm-rolling for carrying out the band until the band has 0.5mm or smaller final
Thickness.
6. a kind of high silicon steel plate with excellent machining property and magnetic property, the high silicon steel plate passes through any in claim 1-5
Prepared by the method described in, the high silicon steel plate includes the C counted based on weight %：Less than 0.05% (not including 0%), N：
Less than 0.05% (not including 0%), Si：4% to 7%, Al：0.5% to 3%, Si+Al：4.5% to 8%, and surplus be Fe and
Inevitable impurity.
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| KR1020110138478A KR101449093B1 (en) | 2011-12-20 | 2011-12-20 | High silicon steel sheet having productivity and superior magnetic property and manufacturing method thereof |
| KR10-2011-0138478 | 2011-12-20 | ||
| CN201280062641.9A CN103998629A (en) | 2011-12-20 | 2012-12-20 | High silicon steel sheet having excellent productivity and magnetic properties and method for manufacturing same |
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| EP (1) | EP2796571B1 (en) |
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| WO2019184838A1 (en) | 2018-03-29 | 2019-10-03 | 宝山钢铁股份有限公司 | Manufacturing method for high silicon grain oriented electrical steel sheet |
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| CN103998629A (en) | 2014-08-20 |
| KR20130071132A (en) | 2013-06-28 |
| US10134513B2 (en) | 2018-11-20 |
| EP2796571B1 (en) | 2018-10-31 |
| WO2013095006A1 (en) | 2013-06-27 |
| JP2015507695A (en) | 2015-03-12 |
| EP2796571A1 (en) | 2014-10-29 |
| JP6025864B2 (en) | 2016-11-16 |
| US20140366989A1 (en) | 2014-12-18 |
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| EP2796571A4 (en) | 2016-03-02 |
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